Brain Ventricles — Dorsal & Lateral Views

Brain ventricles, including extensions into olfactory bulbs, are shown in dorsal (top) and lateral (bottom) views. An interventricular foramen connects each lateral ventricle with the third ventricle. A mesencepahlic aqueduct connects the third and fourth ventricles. Lateral recesses and appertures allow cerebrospinal fluid to exit to the subarachnoid space. Each ventricle has a choroid plexus that produces cerebrospinal fluid. Choroid plexuses are bilateral in third and fourth ventrticles.